Calypso [ka-LIP-so] and Telesto
[tah-LESS-toh] are called the Tethys Trojans
because they circle Saturn in the same
orbit as Tethys, about 60
degrees ahead of and behind that body. Telesto is the
leading Trojan and Calypso is the trailing Trojan. Both were
found in 1981 by B. Smith through ground-based observations made in 1980.
Calypso is 34 by 22 by 22 kilometers (21 by 14 by 14 miles).